Detalhes bibliográficos
| Ano de defesa: |
2024 |
| Autor(a) principal: |
BORGES, Bianca Ferreira
 |
| Orientador(a): |
DAMOS, Flávio Santos
|
| Banca de defesa: |
DAMOS, Flávio Santos
,
SILVA, Gilmar Silvério da
,
LIMA, Roberto Batista
|
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal do Maranhão
|
| Programa de Pós-Graduação: |
PROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA/CCET
|
| Departamento: |
DEPARTAMENTO DE QUÍMICA/CCET
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Palavras-chave em Inglês: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
https://tedebc.ufma.br/jspui/handle/tede/5210
|
Resumo: |
This work is based on the development of a photoelectrochemical sensor for the determination of levodopa. Initially, it was evaluated a photoelectrochemical system based on a three electrodes electrochemical system exploiting barium titanate sensitized with bismuth oxi-iodide (BiOI /BaTiO3/FTO) as the working electrode, Ag/AgCl in saturated KCl as the reference electrode, and Au as the counter electrode. Posteriorly, a self-powered photoelectrochemical system using the BiOI/BaTiO3/FTO platform as the photoanode and a copper oxide modified FTO eletrode (Cu2O/FTO) as the photocathode was investigated. X-ray diffraction of BiOI/BaTiO3 was carried out in order to assess the composition of the phases and the structure of the composite. Under optimised conditions, the photoelectrochemical sensor showed a wide linear range, with 4.98-38.5 μmol L-1 and recovery values of 98.74% and 98.28% for levodopa and a linear response range between 9.9-38.5 μmol L-1 for the self-powered photoelectrochemical sensor with recovery of 78.79% and 78.18% for levodopa. The photoelectrochemical system showed good selectivity against the some interferents normally found in the tested sample. |
